Package org.apache.sysds.runtime.matrix.data

Class CTableMap

java.lang.Object

org.apache.sysds.runtime.matrix.data.CTableMap

public class CTableMap
extends Object

Ctable map is an abstraction for the hashmap used for ctable's hash group-by because this structure is passed through various interfaces. This makes it easier to (1) exchange the underlying data structure and (2) maintain statistics like max row/column in order to prevent scans during data conversion.

Constructor Summary

Constructors

Constructor	Description
CTableMap()
CTableMap(LongLongDoubleHashMap.EntryType type)

Method Summary

Modifier and Type	Method	Description
void	aggregate(long row, long col, double w)
Iterator<LongLongDoubleHashMap.ADoubleEntry>	getIterator()
long	getMaxColumn()
long	getMaxRow()
int	size()
MatrixBlock	toMatrixBlock(int rlen, int clen)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CTableMap

public CTableMap()

CTableMap

public CTableMap(LongLongDoubleHashMap.EntryType type)

Method Details

size

public int size()

getIterator

public Iterator<LongLongDoubleHashMap.ADoubleEntry> getIterator()

getMaxRow

public long getMaxRow()

getMaxColumn

public long getMaxColumn()

aggregate

public void aggregate(long row,
 long col,
 double w)

toMatrixBlock

public MatrixBlock toMatrixBlock(int rlen,
 int clen)